A gigabit should be around 125 megabytes according to some quick calculatoring.
(1,000,000,000 / 8) / 1,000,000 = 125
1,000,000,000 bits in a gigabit. 8 bits in a byte. ~1,000,000 bytes in a megabyte.
A bit is a 1 or 0 (on or off). Eight bits make up a byte. Each byte is a character represented by a mixture of eight 1s or 0s.
So the word "jello" would be made up of 40 bits.
EDIT: And here is "jello" in binary: 0110101001100101011011000110110001101111
So, sending "jello" over gigabit ethernet would take 0.00000004 seconds under ideal conditions.